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authorRajendra Nayak <rnayak@ti.com>2012-08-09 11:08:21 +0400
committerKevin Hilman <khilman@ti.com>2012-08-09 19:07:47 +0400
commit1b8652142334a8c0729c5c4536a22cfc6fc49297 (patch)
treeaf0cfa1b7d2c86221fb141b91f9d1cdf85022992 /drivers/cpufreq
parent5b6e3eb576e8ad03264d46982afed77bdc6323a3 (diff)
downloadlinux-1b8652142334a8c0729c5c4536a22cfc6fc49297.tar.xz
cpufreq: OMAP: Handle missing frequency table on SMP systems
On OMAP4, if the first CPU fails to get a valid frequency table (this could happen if the platform does not register any OPP table), the subsequent CPU instances end up dealing with a NULL freq_table and crash. Check for an already existing freq_table, before trying to create one, and increment the freq_table_users only if the table is sucessfully created. Signed-off-by: Rajendra Nayak <rnayak@ti.com> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Cc: <linux-pm@vger.kernel.org> Signed-off-by: Kevin Hilman <khilman@ti.com>
Diffstat (limited to 'drivers/cpufreq')
-rw-r--r--drivers/cpufreq/omap-cpufreq.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/cpufreq/omap-cpufreq.c b/drivers/cpufreq/omap-cpufreq.c
index 17fa04d08be9..b47034e650a5 100644
--- a/drivers/cpufreq/omap-cpufreq.c
+++ b/drivers/cpufreq/omap-cpufreq.c
@@ -218,7 +218,7 @@ static int __cpuinit omap_cpu_init(struct cpufreq_policy *policy)
policy->cur = policy->min = policy->max = omap_getspeed(policy->cpu);
- if (atomic_inc_return(&freq_table_users) == 1)
+ if (!freq_table)
result = opp_init_cpufreq_table(mpu_dev, &freq_table);
if (result) {
@@ -227,6 +227,8 @@ static int __cpuinit omap_cpu_init(struct cpufreq_policy *policy)
goto fail_ck;
}
+ atomic_inc_return(&freq_table_users);
+
result = cpufreq_frequency_table_cpuinfo(policy, freq_table);
if (result)
goto fail_table;